334 lines
9.5 KiB
C
334 lines
9.5 KiB
C
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/*
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==============================================================================
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This file is part of the JUCE examples.
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Copyright (c) 2020 - Raw Material Software Limited
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The code included in this file is provided under the terms of the ISC license
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http://www.isc.org/downloads/software-support-policy/isc-license. Permission
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To use, copy, modify, and/or distribute this software for any purpose with or
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without fee is hereby granted provided that the above copyright notice and
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this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES,
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WHETHER EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR
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PURPOSE, ARE DISCLAIMED.
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==============================================================================
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*/
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/*******************************************************************************
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The block below describes the properties of this PIP. A PIP is a short snippet
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of code that can be read by the Projucer and used to generate a JUCE project.
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BEGIN_JUCE_PIP_METADATA
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name: Box2DDemo
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version: 1.0.0
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vendor: JUCE
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website: http://juce.com
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description: Showcases 2D graphics features.
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dependencies: juce_box2d, juce_core, juce_data_structures, juce_events,
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juce_graphics, juce_gui_basics
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exporters: xcode_mac, vs2019, linux_make, androidstudio, xcode_iphone
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moduleFlags: JUCE_STRICT_REFCOUNTEDPOINTER=1
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type: Component
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mainClass: Box2DDemo
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useLocalCopy: 1
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END_JUCE_PIP_METADATA
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*******************************************************************************/
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#pragma once
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#include "../Assets/DemoUtilities.h"
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//==============================================================================
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// (These classes and random functions are used inside the 3rd-party Box2D demo code)
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inline float32 RandomFloat() { return Random::getSystemRandom().nextFloat() * 2.0f - 1.0f; }
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inline float32 RandomFloat (float32 lo, float32 hi) { return Random::getSystemRandom().nextFloat() * (hi - lo) + lo; }
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struct Settings
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{
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b2Vec2 viewCenter { 0.0f, 20.0f };
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float32 hz = 60.0f;
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int velocityIterations = 8;
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int positionIterations = 3;
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int drawShapes = 1;
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int drawJoints = 1;
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int drawAABBs = 0;
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int drawPairs = 0;
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int drawContactPoints = 0;
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int drawContactNormals = 0;
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int drawContactForces = 0;
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int drawFrictionForces = 0;
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int drawCOMs = 0;
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int drawStats = 0;
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int drawProfile = 0;
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int enableWarmStarting = 1;
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int enableContinuous = 1;
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int enableSubStepping = 0;
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int pause = 0;
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int singleStep = 0;
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};
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struct Test
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{
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Test() {}
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virtual ~Test() {}
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virtual void Keyboard (unsigned char /*key*/) {}
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virtual void KeyboardUp (unsigned char /*key*/) {}
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std::unique_ptr<b2World> m_world { new b2World (b2Vec2 (0.0f, -10.0f)) };
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};
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JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wimplicit-int-float-conversion")
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#include "../Assets/Box2DTests/AddPair.h"
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#include "../Assets/Box2DTests/ApplyForce.h"
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#include "../Assets/Box2DTests/Dominos.h"
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#include "../Assets/Box2DTests/Chain.h"
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JUCE_END_IGNORE_WARNINGS_GCC_LIKE
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//==============================================================================
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/** This list box just displays a StringArray and broadcasts a change message when the
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selected row changes.
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*/
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class Box2DTestList : public ListBoxModel,
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public ChangeBroadcaster
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{
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public:
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Box2DTestList (const StringArray& testList)
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: tests (testList)
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{}
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int getNumRows() override { return tests.size(); }
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void selectedRowsChanged (int /*lastRowSelected*/) override { sendChangeMessage(); }
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void paintListBoxItem (int row, Graphics& g, int w, int h, bool rowIsSelected) override
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{
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auto& lf = LookAndFeel::getDefaultLookAndFeel();
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if (rowIsSelected)
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g.fillAll (Colour::contrasting (lf.findColour (ListBox::textColourId),
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lf.findColour (ListBox::backgroundColourId)));
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g.setColour (lf.findColour (ListBox::textColourId));
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g.setFont ((float) h * 0.7f);
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g.drawText (tests[row], Rectangle<int> (0, 0, w, h).reduced (2),
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Justification::centredLeft, true);
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}
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private:
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StringArray tests;
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (Box2DTestList)
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};
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//==============================================================================
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struct Box2DRenderComponent : public Component
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{
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Box2DRenderComponent()
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{
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setOpaque (true);
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}
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void paint (Graphics& g) override
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{
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g.fillAll (Colours::white);
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if (currentTest.get() != nullptr)
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{
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Box2DRenderer renderer;
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renderer.render (g, *currentTest->m_world,
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-16.0f, 30.0f, 16.0f, -1.0f,
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getLocalBounds().toFloat().reduced (8.0f));
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}
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}
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std::unique_ptr<Test> currentTest;
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};
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//==============================================================================
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class Box2DDemo : public Component,
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private Timer,
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private ChangeListener
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{
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public:
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enum Demos
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{
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addPair = 0,
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applyForce,
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dominoes,
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chain,
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numTests
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};
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Box2DDemo()
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: testsList (getTestsList())
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{
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setOpaque (true);
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setWantsKeyboardFocus (true);
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testsListModel.addChangeListener (this);
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addAndMakeVisible (renderComponent);
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addAndMakeVisible (testsListBox);
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testsListBox.setModel (&testsListModel);
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testsListBox.selectRow (dominoes);
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addAndMakeVisible (instructions);
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instructions.setMultiLine (true);
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instructions.setReadOnly (true);
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startTimerHz (60);
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setSize (500, 500);
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}
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~Box2DDemo() override
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{
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testsListModel.removeChangeListener (this);
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}
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void paint (Graphics& g) override
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{
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g.fillAll (getUIColourIfAvailable (LookAndFeel_V4::ColourScheme::UIColour::windowBackground));
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}
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void resized() override
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{
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auto r = getLocalBounds().reduced (4);
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auto area = r.removeFromBottom (150);
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testsListBox.setBounds (area.removeFromLeft (150));
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area.removeFromLeft (4);
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instructions.setBounds (area);
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r.removeFromBottom (6);
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renderComponent.setBounds (r);
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}
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bool keyPressed (const KeyPress& key) override
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{
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if (renderComponent.currentTest.get() != nullptr)
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{
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// We override this to avoid the system beeping for an unused keypress
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switch (key.getTextCharacter())
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{
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case 'a':
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case 'w':
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case 'd':
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return true;
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default:
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break;
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}
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}
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return false;
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}
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private:
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StringArray testsList;
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Box2DTestList testsListModel { testsList };
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Box2DRenderComponent renderComponent;
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ListBox testsListBox;
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TextEditor instructions;
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static Test* createTest (int index)
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{
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switch (index)
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{
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case addPair: return new AddPair();
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case applyForce: return new ApplyForce();
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case dominoes: return new Dominos();
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case chain: return new Chain();
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default: break;
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}
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return nullptr;
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}
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static String getInstructions (int index)
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{
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switch (index)
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{
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case applyForce:
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return String ("Keys:") + newLine + "Left: \'a\'" + newLine
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+ "Right: \'d\'" + newLine + "Forward: \'w\'";
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default:
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break;
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}
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return {};
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}
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void checkKeys()
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{
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if (renderComponent.currentTest.get() == nullptr)
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return;
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checkKeyCode ('a');
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checkKeyCode ('w');
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checkKeyCode ('d');
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}
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void checkKeyCode (const int keyCode)
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{
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if (KeyPress::isKeyCurrentlyDown (keyCode))
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renderComponent.currentTest->Keyboard ((unsigned char) keyCode);
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}
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void timerCallback() override
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{
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if (renderComponent.currentTest.get() == nullptr)
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return;
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if (isShowing())
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grabKeyboardFocus();
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checkKeys();
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renderComponent.currentTest->m_world->Step (1.0f / 60.0f, 6, 2);
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repaint();
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}
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void changeListenerCallback (ChangeBroadcaster* source) override
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{
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if (source == &testsListModel)
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{
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auto index = testsListBox.getSelectedRow();
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renderComponent.currentTest.reset (createTest (index));
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instructions.setText (getInstructions (index));
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repaint();
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}
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}
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void lookAndFeelChanged() override
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{
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instructions.applyFontToAllText (instructions.getFont());
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}
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static StringArray getTestsList()
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{
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return { "Add Pair Stress Test", "Apply Force", "Dominoes", "Chain" };
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}
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (Box2DDemo)
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};
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